特殊用法belt tightener1.紧带轮(拉紧轮)bolt tightener1.螺栓紧固器chain tightener1.链条张紧器guy tightener1.紧索轮hand and crown tightener1.针和柄头涨紧圈pulley tightener1.紧带轮screw-cap tightener1.(玻璃罐的)螺旋盖拧盖机stay tightener1.拉线紧固体winding tightener1.复卷机张紧辊wooden sleeper binding wire tightener1.枕木紧线器